Synthesis, antitumor and antioxidant evaluation of some new thiazole and thiophene derivatives incorporated coumarin moiety
作者:Moustafa A. Gouda、Moged A. Berghot、Eman A. Baz、Wafaa S. Hamama
DOI:10.1007/s00044-011-9610-8
日期:2012.7
which cyclized with chloroacetyl chloride to give the thiazolidinone 9. Acidification of 8 with HCl afforded the thiocarbamoyl 10, which condensed with 2 in DMF to give the mercapto derivative 12, whereas in DMF/TEA gave the thiophene derivative 13. The thiophenes 15a–c were achieved via treatment of the thiocarbamoyls 14a–c with 2 in DMF/TEA, whereas, in DMF gave the corresponding thiazoles 16a–c
摘要3-乙酰基香豆素(1)用作用于2-氨基噻唑衍生物的合成中的关键中间体3 经由溴化1随后处理所形成的乙酰溴2与硫脲或通过的Bignailli反应1。用2处理3得到双香豆素4,而用3进行氰基乙酰化,然后用水杨醛处理形成的氰基乙酰胺6,得到双香豆素7。反应6用异硫氰酸苯酯在DMF / KOH中制得钾盐8,将其与氯乙酰氯环合,得到噻唑烷酮9。用HCl酸化8得到硫代氨甲酰基10,在DMF中与2缩合得到巯基衍生物12,在DMF / TEA中得到噻吩衍生物13。噻吩15a – c是通过在DMF / TEA中用2处理硫代氨基甲酰基14a – c而获得的,而在DMF中则得到了相应的噻唑16a – c。在DMF / KOH中用二硫化碳处理组分17a,b,然后添加2,得到二硫缩醛19a,b。19b在碱性条件下的环化反应得到所需的噻吩20。评价合成产物的代表性化合物作为抗肿瘤剂和抗氧化剂。 图形概要3-乙酰香